Determine the mass of phosphorus reacted with 10 liters of oxygen according to the equation 4P + 5O2 = 2P2O5
July 31, 2021
V (O2) = 10 l
m (P) -?
1) 4P + 5O2 => 2P2O5;
2) n (O2) = V (O2) / Vm = 10 / 22.4 = 0.45 mol;
3) n (P) = n (O2) * 4/5 = 0.45 * 4/5 = 0.36 mol;
4) m (P) = n (P) * M (P) = 0.36 * 31 = 11.2 g.
Answer: Mass P is 11.2 g.
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